CN104596222B - Heat exchange type tail recuperation of heat microwave oxygen barrier drying machine - Google Patents
Heat exchange type tail recuperation of heat microwave oxygen barrier drying machine Download PDFInfo
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- 230000004888 barrier function Effects 0.000 title claims abstract description 30
- 238000001035 drying Methods 0.000 title claims abstract description 28
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 239000001301 oxygen Substances 0.000 title claims abstract description 26
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 26
- 239000011521 glass Substances 0.000 claims abstract description 40
- 239000000463 material Substances 0.000 claims abstract description 38
- 238000002955 isolation Methods 0.000 claims abstract description 24
- 239000000758 substrate Substances 0.000 claims abstract description 7
- 239000007789 gas Substances 0.000 claims description 10
- 241000883990 Flabellum Species 0.000 claims 1
- 238000005276 aerator Methods 0.000 claims 1
- 230000008676 import Effects 0.000 claims 1
- 238000011084 recovery Methods 0.000 abstract description 12
- 102000004190 Enzymes Human genes 0.000 abstract description 6
- 108090000790 Enzymes Proteins 0.000 abstract description 6
- 230000001590 oxidative effect Effects 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 230000002255 enzymatic effect Effects 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 abstract description 2
- 230000002779 inactivation Effects 0.000 abstract 1
- 230000001360 synchronised effect Effects 0.000 abstract 1
- 238000007602 hot air drying Methods 0.000 description 13
- 238000010438 heat treatment Methods 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 239000003638 chemical reducing agent Substances 0.000 description 5
- 241000234435 Lilium Species 0.000 description 3
- 238000000265 homogenisation Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000026058 directional locomotion Effects 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 238000001291 vacuum drying Methods 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
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Abstract
本发明公开了一种换热式尾热回收微波隔氧干燥机，玻璃罩为隧道形，外设有微波单元并固定在输送带下面的基板上，输送带上的物料在隧道形玻璃罩内被微波单元加热后经溜板抵达隔离箱体的输送带上；隧道形玻璃罩的出口设有阻隔幕帘和鼓风机，进口设有阻隔幕帘和抽气管，抽气管经板式换热器进入隔离箱体的右端，隔离箱体内设有对流风扇并有输送带从右往左穿过，隔离箱体的左端设有抽风机。本发明实现了非真空条件下的连续化高效灭酶与同步隔氧干燥，便于产业化实施；尾热回收简单可靠，降低了成本和能耗，实现节能减排；后段热风并流有利于温和干燥和保持均一品质，尤其适合易于发生酶促与高温氧化褐变的农产品干燥，应用前景广阔。
The invention discloses a heat-exchanging tail heat recovery microwave oxygen-insulating dryer. The glass cover is tunnel-shaped, and a microwave unit is arranged outside and fixed on the substrate under the conveyor belt. The materials on the conveyor belt are inside the tunnel-shaped glass cover. After being heated by the microwave unit, it reaches the conveyor belt of the isolation box through the sliding plate; the exit of the tunnel-shaped glass cover is equipped with a barrier curtain and a blower, and the entrance is equipped with a barrier curtain and an exhaust pipe, and the exhaust pipe enters the isolation box through a plate heat exchanger. At the right end of the box body, a convection fan is arranged in the isolation box body and a conveyor belt passes from right to left, and an exhaust fan is arranged at the left end of the isolation box body. The invention realizes continuous high-efficiency enzyme inactivation and synchronous oxygen barrier drying under non-vacuum conditions, which is convenient for industrialization implementation; tail heat recovery is simple and reliable, reduces cost and energy consumption, and realizes energy saving and emission reduction; the parallel flow of hot air in the rear section is beneficial Mild drying and maintaining uniform quality, especially suitable for drying agricultural products prone to enzymatic and high-temperature oxidative browning, with broad application prospects.
Description
技术领域 technical field
本发明涉及一种换热式尾热回收微波隔氧干燥机。 The invention relates to a heat exchange type tail heat recovery microwave oxygen insulation dryer.
背景技术 Background technique
干燥就是将物料中的水分去除，在食品、化工、农产品加工、生物制品处理等领域都有广泛应用，是使用频率很高的单元操作。 Drying is to remove the moisture in the material, which is widely used in food, chemical industry, agricultural product processing, biological product processing and other fields, and is a unit operation with high frequency of use.
干燥可以利用自然条件进行晾干或者晒干，但对于工业化生产来说，干燥一般在干燥机中进行，对于百合这类易于发生酶促与氧化褐变的农产品来说，一般需要先高温水煮进行杀酶处理后再干燥，而且干燥还具有特别的要求，就是希望在加热的同时隔氧（加热时氧化褐变的速度会大幅度增加），在隔氧的条件下进行快速、高效的干燥，这样才能快速有效的杀酶和防止氧化褐变，确保产品质量。 Drying can be carried out in the air or in the sun under natural conditions, but for industrial production, drying is generally carried out in a dryer. For agricultural products such as lilies that are prone to enzymatic and oxidative browning, they generally need to be boiled at high temperature first. Drying is carried out after enzyme-killing treatment, and drying also has special requirements, that is, it is hoped that oxygen should be separated while heating (the speed of oxidative browning will be greatly increased during heating), and fast and efficient drying can be carried out under the condition of oxygen separation , so as to quickly and effectively kill enzymes and prevent oxidative browning to ensure product quality.
为了达到隔氧的目的，现阶段一般采用真空干燥，但真空干燥成本高、效率低，对设备也有较高的要求，很难实现连续化的工业生产；而另一方面，现有的干燥设备还普遍存在能耗高、热传递渗透困难的技术应用障碍，因而现有技术无法满足百合这一类易于发生酶促与氧化褐变的产品干燥。 In order to achieve the purpose of oxygen isolation, vacuum drying is generally used at this stage, but the cost of vacuum drying is high, the efficiency is low, and there are high requirements for equipment, so it is difficult to realize continuous industrial production; on the other hand, the existing drying equipment There are also technical application obstacles of high energy consumption and difficulty in heat transfer and penetration, so the existing technology cannot meet the drying of lilies, which are prone to enzymatic and oxidative browning.
发明内容 Contents of the invention
本发明要解决的技术问题就是克服现有技术的不足，提供一种低能耗、快速、高效、便于工业化连续生产的换热式尾热回收微波隔氧干燥机。 The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and provide a heat-exchanging tail heat recovery microwave oxygen-insulated dryer with low energy consumption, fast, high efficiency, and convenient for industrialized continuous production.
为克服现有技术的不足，本发明采取以下技术方案： In order to overcome the deficiencies in the prior art, the present invention takes the following technical solutions:
一种换热式尾热回收微波隔氧干燥机，包括输送带、微波单元和玻璃罩，其特征在于：玻璃罩为隧道形并固定在输送带下面的基板上，隧道形玻璃罩外设有微波单元，输送带上的物料在隧道形玻璃罩内被微波单元加热后经溜板抵达隔离箱体的输送带上；隧道形玻璃罩的出口设有阻隔幕帘和鼓风机，进口设有阻隔幕帘和抽气管，抽气管上设有风门并连接抽风机，抽风机连接板式换热器，板式换热器设有尾气口和空气进口，板式换热器的热空气出口经热空气管和抽风机连接隔离箱体的右端，隔离箱体内设有对流风扇并有输送带从右往左穿过，隔离箱体的左端设有抽风机，抽风机的排气口与外界连通。 A heat exchange tail heat recovery microwave oxygen insulation dryer, including a conveyor belt, a microwave unit and a glass cover, characterized in that the glass cover is tunnel-shaped and fixed on the substrate under the conveyor belt, and the tunnel-shaped glass cover is equipped with Microwave unit, the material on the conveyor belt is heated by the microwave unit in the tunnel-shaped glass cover and then arrives on the conveyor belt of the isolation box through the slide plate; the exit of the tunnel-shaped glass cover is equipped with a barrier curtain and blower, and the entrance is equipped with a barrier curtain Curtain and exhaust pipe, the exhaust pipe is equipped with a damper and connected to the exhaust fan, the exhaust fan is connected to the plate heat exchanger, the plate heat exchanger is provided with an exhaust port and an air inlet, the hot air outlet of the plate heat exchanger passes through the hot air pipe and the exhaust air The machine is connected to the right end of the isolation box. The isolation box is equipped with a convection fan and a conveyor belt passes from right to left. The left end of the isolation box is equipped with an exhaust fan, and the exhaust port of the exhaust fan communicates with the outside world.
所述隧道形玻璃罩的输送带由主动轮带动尾轮进行工作，主动轮由电机与减速机带动链传动进行工作，输送带左端设有进料斗。 The conveyor belt of the tunnel-shaped glass cover is driven by the driving wheel to drive the tail wheel to work, and the driving wheel is driven by the motor and the reducer to drive the chain drive to work, and the left end of the conveyor belt is provided with a feeding hopper.
所述隔离箱体的输送带由主动轮带动尾轮进行工作，输送带的左端设有成品槽。 The conveyor belt of the isolation box is driven by the driving wheel to drive the tail wheel to work, and the left end of the conveyor belt is provided with a finished product groove.
所述对流风扇由电机和扇叶组成。 The convection fan consists of a motor and fan blades.
本发明实质上由微波隔氧干燥系统、尾热回收系统和热风干燥系统这三部分组成，下面分别进行叙述。 The present invention is essentially composed of three parts: a microwave oxygen barrier drying system, a tail heat recovery system and a hot air drying system, which will be described separately below.
（1）微波隔氧、快速灭酶干燥系统： (1) Microwave Oxygen Barrier, Rapid Enzyme Destruction Drying System:
物料输送由电机与减速机、链传动、输送带主动轮、尾轮、输送带构成物料输送体系，合理排布的微波单元与隧道形玻璃罩构成隔氧微波加热体系；玻璃罩能全穿过微波实现对物料加热，隧道形玻璃罩扣在基板上，输送带运送物料，隧道形玻璃罩、阻隔幕帘以及外围设备进行隔氧。 The material conveying system consists of a motor, a reducer, a chain drive, a conveyor belt driving wheel, a tail wheel, and a conveyor belt. The microwave units arranged reasonably and the tunnel-shaped glass cover form an oxygen-isolated microwave heating system; the glass cover can pass through Microwave heats the material, the tunnel-shaped glass cover is buckled on the substrate, the conveyor belt transports the material, and the tunnel-shaped glass cover, barrier curtain and peripheral equipment are used for oxygen isolation.
当系统工作时，由于抽风机的作用，物料受微波加热产生的水蒸汽在隧道形玻璃罩内由右向左形成定向运动是隔氧与排除空气的关键要素。物料随输送带由左向右穿过阻隔幕帘进入隧道形玻璃罩内，一开始就能被由右向左定向运动的水蒸汽排除氧气并被微波强热迅速灭酶，物料由左向右与由右向左定向水蒸气气流构成逆向运动，物料得以在微波作用下隔氧逐步干燥，当物料被干燥从隧道形玻璃罩右端通过阻隔幕帘出来，就迅速被鼓风机鼓风快速强制冷却，避免物料温度较高可能产生的再氧化和高温褐变。 When the system is working, due to the function of the exhaust fan, the water vapor generated by the microwave heating of the material forms a directional movement from right to left in the tunnel-shaped glass cover, which is the key element for oxygen isolation and air removal. The material goes through the barrier curtain from left to right with the conveyor belt and enters the tunnel-shaped glass cover. At the beginning, the water vapor moving from right to left can remove oxygen and be quickly sterilized by microwave heat. The material goes from left to right. Consisting of a reverse movement with the directional water vapor airflow from right to left, the material can be gradually dried under the action of microwaves in an oxygen barrier. When the material is dried and passes through the barrier curtain from the right end of the tunnel-shaped glass cover, it is quickly forced to cool by the blower. Avoid re-oxidation and high-temperature browning that may occur when the material temperature is high.
阻隔幕帘起到与外界空气隔离的作用。 The barrier curtain plays the role of isolating from the outside air.
（2）尾热回收系统： (2) Tail heat recovery system:
从隧道形玻璃罩左端溢出气体以水蒸气为主具有很大的热焓，需要回收利用作为后期热风干燥加热的热源。调节风门，气体通过抽气管和风机进入板式换热器换热后，低温尾气由尾气口排空，新鲜空气由进口进入板式换热器进行换热升温成为热空气，通过热空气出口由管道导入抽风机，将回收的尾热用于下一步热风干燥。 The gas overflowing from the left end of the tunnel-shaped glass cover is mainly water vapor with a large heat enthalpy, which needs to be recycled as a heat source for later hot air drying and heating. Adjust the damper, the gas enters the plate heat exchanger through the exhaust pipe and the fan for heat exchange, the low-temperature exhaust gas is evacuated from the exhaust port, and the fresh air enters the plate heat exchanger from the inlet for heat exchange and heats up to become hot air, which is introduced into the pipe through the hot air outlet The exhaust fan uses the recovered tail heat for the next step of hot air drying.
（3）热风干燥系统： (3) Hot air drying system:
物料从玻璃罩出来后被鼓风机快速强制冷却，温度下降后不会再被氧化和高温褐变，通过物料溜板进入下一级热风干燥。 After the material comes out of the glass cover, it is quickly and forcibly cooled by the blower. After the temperature drops, it will not be oxidized and browned at high temperature, and it will enter the next stage of hot air drying through the material slide plate.
热风干燥系统的物料输送由尾轮、输送带和主动轮实现，隔离箱体内布置电机和扇叶组成的内循环风扇，实现强对流穿透物料和热风干燥，热风来源尾热回收，抽风机送入热空气穿过箱体与物料并流，起到温和均化干燥的作用，最后抽风机将高湿度的废气通过排气口排空，成品物料落下暂存成品槽待用。 The material transportation of the hot air drying system is realized by the tail wheel, the conveyor belt and the driving wheel. The internal circulation fan composed of the motor and the fan blade is arranged in the isolation box to realize the strong convection penetrating the material and hot air drying. The incoming hot air passes through the box and co-flows with the materials, which plays a role of gentle homogenization and drying. Finally, the exhaust fan empties the high-humidity exhaust gas through the exhaust port, and the finished materials fall into the finished product tank for temporary storage for use.
与现有技术相比，本发明的有益效果还在于： Compared with prior art, the beneficial effect of the present invention also lies in:
微波加热快速、高效、穿透能力强，巧妙利用由右向左定向运动的水蒸汽实现了非真空条件下的连续化高效灭酶与隔氧干燥，并且是将隔氧杀酶和隔氧干燥同步完成，便于产业化低成本实施；板式换热器进行尾热回收简单可靠，降低了成本和能耗，实现节能减排；后段热风并流有利于物料均化温和干燥，便于保持物料的均一品质；本发明尤其适合百合这一类等易于发生酶促与高温氧化褐变的农产品干燥，有利于提高这类产品的干燥品质，应用前景广阔。 Microwave heating is fast, efficient, and has strong penetrating ability. The water vapor moving from right to left is cleverly used to realize continuous and efficient enzyme killing and oxygen barrier drying under non-vacuum conditions, and it is the combination of oxygen barrier enzyme killing and oxygen barrier drying. Simultaneous completion, which is convenient for low-cost implementation of industrialization; tail heat recovery by plate heat exchanger is simple and reliable, which reduces cost and energy consumption, and realizes energy saving and emission reduction; the parallel flow of hot air in the rear section is conducive to material homogenization and gentle drying, and is convenient for maintaining the temperature of materials. Uniform quality; the invention is especially suitable for drying agricultural products such as lilies, which are prone to enzymatic and high-temperature oxidative browning, and is conducive to improving the drying quality of such products, with broad application prospects.
附图说明 Description of drawings
图1是本发明的平面结构示意图。 Fig. 1 is a schematic plan view of the present invention.
图2是隧道形玻璃罩内的断面结构示意图。 Fig. 2 is a schematic diagram of the cross-sectional structure inside the tunnel-shaped glass cover.
图中各标号表示： Each label in the figure means:
1、电机与减速机；2、链传动；3、进料斗；4、阻隔幕帘；5、抽气管；6、排气口；7、微波单元；8、主动轮；9、抽风机；10、成品槽；11、风门；12、抽风机；13、空气进口；14、尾气口；15、热空气出口；16、板式换热器；17、热空气管；18、鼓风机；19、隧道形玻璃罩；20、输送带；21、尾轮；22、风扇电机；23、抽风机；24、尾轮；25、扇叶；26、输送带；27、主动轮；28、隔离箱体；30、基板；32、物料；33物料溜板。 1. Motor and reducer; 2. Chain drive; 3. Feeding hopper; 4. Barrier curtain; 5. Exhaust pipe; 6. Exhaust port; 7. Microwave unit; 8. Drive wheel; 9. Exhaust fan; 10. Finished tank; 11. Damper; 12. Exhaust fan; 13. Air inlet; 14. Tail gas outlet; 15. Hot air outlet; 16. Plate heat exchanger; 17. Hot air pipe; 18. Blower; 19. Tunnel Shaped glass cover; 20, conveyor belt; 21, tail wheel; 22, fan motor; 23, exhaust fan; 24, tail wheel; 25, fan blade; 26, conveyor belt; 27, driving wheel; 28, isolation box; 30, substrate; 32, material; 33 material sliding plate.
具体实施方式 detailed description
现结合附图，对本发明进一步具体说明。 Now in conjunction with accompanying drawing, the present invention is described in further detail.
如图1和图2所示换热式尾热回收微波隔氧干燥机，包括输送带20、微波单元7和玻璃罩19，玻璃罩19为隧道形并固定在输送带20下面的基板30上，隧道形玻璃罩19外设有微波单元7，输送带20上的物料32在隧道形玻璃罩19内被微波单元7加热后经溜板33抵达隔离箱体28的输送带26上；隧道形玻璃罩19的出口设有阻隔幕帘4和鼓风机18，进口设有阻隔幕帘4和抽气管5，抽气管5上设有风门11并连接抽风机12，抽风机12连接板式换热器16，板式换热器16设有尾气口14和空气进口13，板式换热器16的热空气出口15经热空气管17和抽风机23连接隔离箱体28的右端，隔离箱体28内设有对流风扇并有输送带26从右往左穿过，隔离箱体28的左端设有抽风机9，抽风机9的排气口6与外界连通。 As shown in Figure 1 and Figure 2, the heat exchange tail heat recovery microwave oxygen barrier dryer includes a conveyor belt 20, a microwave unit 7 and a glass cover 19, the glass cover 19 is tunnel-shaped and fixed on the substrate 30 below the conveyor belt 20 The tunnel-shaped glass cover 19 is provided with a microwave unit 7, and the material 32 on the conveyor belt 20 is heated by the microwave unit 7 in the tunnel-shaped glass cover 19 and arrives on the conveyor belt 26 of the isolation box 28 through the slide plate 33; The outlet of the glass cover 19 is provided with a barrier curtain 4 and a blower 18, and the inlet is provided with a barrier curtain 4 and an air exhaust pipe 5. The air exhaust pipe 5 is provided with a damper 11 and connected to an exhaust fan 12, and the exhaust fan 12 is connected to a plate heat exchanger 16 , the plate heat exchanger 16 is provided with an exhaust port 14 and an air inlet 13, and the hot air outlet 15 of the plate heat exchanger 16 is connected to the right end of the isolation box 28 through the hot air pipe 17 and the exhaust fan 23, and the isolation box 28 is provided with The convection fan also has a conveyor belt 26 passing from right to left, and the left end of the isolation box 28 is provided with an exhaust fan 9, and the exhaust port 6 of the exhaust fan 9 communicates with the outside world.
所述隧道形玻璃罩19的输送带20由主动轮8带动尾轮21进行工作，主动轮8由电机与减速机1带动链传动2进行工作，输送带20左端设有进料斗3。 The conveyor belt 20 of the tunnel-shaped glass cover 19 is driven by the driving wheel 8 to drive the tail wheel 21 to work, and the driving wheel 8 is driven by the motor and the reducer 1 to drive the chain drive 2 to work. The left end of the conveyor belt 20 is provided with a feed hopper 3 .
所述隔离箱体28的输送带26由主动轮27带动尾轮24进行工作，输送带26的左端设有成品槽10。 The conveyor belt 26 of the isolation box 28 is driven by the driving wheel 27 to work the tail wheel 24, and the left end of the conveyor belt 26 is provided with a finished product tank 10.
所述对流风扇由电机22和扇叶25组成。 Described convection fan is made up of motor 22 and fan blade 25.
本实施例实质上由微波隔氧干燥系统、尾热回收系统和热风干燥系统这三部分组成，下面分别进行叙述。 This embodiment is essentially composed of three parts: a microwave oxygen barrier drying system, an exhaust heat recovery system and a hot air drying system, which will be described separately below.
（1）微波隔氧、快速灭酶干燥系统： (1) Microwave Oxygen Barrier, Rapid Enzyme Destruction Drying System:
物料输送由电机与减速机1、链传动2、输送带主动轮8、尾轮21、输送带20构成物料输送体系，合理排布的微波单元7与隧道形玻璃罩19构成隔氧微波加热体系；玻璃罩19能全穿过微波实现对物料32加热，隧道形玻璃罩19扣在基板30上，输送带20运送物料，隧道形玻璃罩19、阻隔幕帘4以及外围设备进行隔氧。 The material conveying system consists of a motor, a reducer 1, a chain drive 2, a conveyor belt driving wheel 8, a tail wheel 21, and a conveyor belt 20. The microwave unit 7 arranged reasonably and the tunnel-shaped glass cover 19 constitute an oxygen-insulated microwave heating system. The glass cover 19 can fully pass through the microwave to heat the material 32, the tunnel-shaped glass cover 19 is buckled on the substrate 30, the conveyor belt 20 transports the material, and the tunnel-shaped glass cover 19, the barrier curtain 4 and peripheral equipment are oxygen-isolated.
当系统工作时，由于抽风机12的作用，物料受微波加热产生的水蒸汽在隧道形玻璃罩19内由右向左形成定向运动是隔氧与排除空气的关键要素。物料随输送带20由左向右穿过阻隔幕帘4进入隧道形玻璃罩19内，一开始就能被由右向左定向运动的水蒸汽排除氧气并被微波强热迅速灭酶，物料32由左向右与由右向左定向水蒸气气流构成逆向运动，物料32得以在微波作用下隔氧逐步干燥，当物料被干燥从隧道形玻璃罩19右端通过阻隔幕帘4出来，就迅速被鼓风机18鼓风快速强制冷却，避免物料温度较高可能产生的再氧化和高温褐变。 When the system is working, due to the effect of the exhaust fan 12, the water vapor generated by the microwave heating of the material forms a directional movement from right to left in the tunnel-shaped glass cover 19, which is the key element for oxygen isolation and air removal. The material passes through the barrier curtain 4 from left to right along with the conveyor belt 20 and enters the tunnel-shaped glass cover 19. At the beginning, the water vapor moving from right to left can remove oxygen and be rapidly extinguished by microwave heat. The material 32 The water vapor flow from left to right and from right to left constitutes a reverse movement, and the material 32 can be gradually dried under the action of microwaves in an oxygen barrier. The blower 18 blows air for rapid forced cooling to avoid re-oxidation and high-temperature browning that may occur when the material temperature is high.
阻隔幕帘4起到与外界空气隔离的作用。 The barrier curtain 4 plays the role of isolating from the outside air.
（2）尾热回收系统： (2) Tail heat recovery system:
从隧道形玻璃罩19左端溢出气体以水蒸气为主具有很大的热焓，需要回收利用作为后期热风干燥加热的热源。调节风门11，气体通过抽气管5和风机12进入板式换热器16换热后，低温尾气由尾气口14排空，新鲜空气由进口13进入板式换热器16进行换热升温成为热空气，通过热空气出口15由管道17导入抽风机23，将回收的尾热用于下一步热风干燥。 The gas overflowing from the left end of the tunnel-shaped glass cover 19 is mainly water vapor and has a large heat enthalpy, which needs to be recycled as a heat source for later stage hot air drying and heating. Adjust the damper 11, the gas enters the plate heat exchanger 16 through the exhaust pipe 5 and the fan 12 for heat exchange, the low-temperature exhaust gas is emptied from the exhaust port 14, and the fresh air enters the plate heat exchanger 16 through the inlet 13 for heat exchange and heat up to become hot air. Through the hot air outlet 15, the exhaust fan 23 is introduced by the pipeline 17, and the recovered tail heat is used for the next step of hot air drying.
（3）热风干燥系统： (3) Hot air drying system:
物料从玻璃罩19出来后被鼓风机快速强制冷却，温度下降后不会再被氧化和高温褐变，通过物料溜板33进入下一级热风干燥。 After the material comes out of the glass cover 19, it is quickly and forcibly cooled by the blower. After the temperature drops, it will no longer be oxidized and high-temperature browned, and it will enter the next stage of hot air drying through the material slide plate 33.
热风干燥系统的物料输送由尾轮24、输送带26和主动轮27实现，隔离箱体28内布置电机22和扇叶25组成的内循环风扇，实现强对流穿透物料和热风干燥，热风来源尾热回收，抽风机23送入热空气穿过箱体28与物料并流，起到温和均化干燥的作用，最后抽风机9将高湿度的废气通过排气口6排空，成品物料落下暂存成品槽10待用。 The material transportation of the hot air drying system is realized by the tail wheel 24, the conveyor belt 26 and the driving wheel 27. The internal circulation fan composed of the motor 22 and the fan blade 25 is arranged in the isolation box 28 to realize strong convection penetrating the material and drying the hot air. The source of the hot air is Tail heat recovery, the exhaust fan 23 sends hot air through the box 28 to co-flow with the materials, which plays a role of gentle homogenization and drying, and finally the exhaust fan 9 empties the high-humidity exhaust gas through the exhaust port 6, and the finished materials fall The finished product tank 10 is temporarily stored for use.
上述只是本发明的较佳实施例，并非对本发明作任何形式上的限制。任何熟悉本领域的技术人员，在不脱离本发明技术方案范围的情况下，都可利用上述揭示的技术内容对本发明技术方案做出许多可能的变动和修饰，或修改为等同变化的等效实施例。因此，凡是未脱离本发明技术方案的内容，依据本发明技术实质对以上实施例所做的任何简单修改、等同变化及修饰，均应落在本发明技术方案保护的范围内。 The above are only preferred embodiments of the present invention, and do not limit the present invention in any form. Any person familiar with the art, without departing from the scope of the technical solution of the present invention, can use the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent implementation of equivalent changes example. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.
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